SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 388cid 4.125 x 1.062RCH, 3.625stroke,6.125rod,0.927pin,-8.9cc,404g,12.9CR, 2618.
SMALL BLOCK CHEVY 23? DOME Gasported / Asymmetrical Valve Pockets PowerPak Plus 359cid 4.040 x 1.250CH, 3.500stroke,6.000rod,0.927pin,12.0cc,478g,13.2CR, 2618.
SMALL BLOCK CHEVY 23? DOME Gasported / Asymmetrical Valve Pockets PowerPak Plus 357cid 4.030 x 1.250CH, 3.500stroke,6.000rod,0.927pin,12.0cc,474g,13.1CR, 2618.
SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 380cid 4.155 x 1.125CH, 3.500stroke,6.125rod,0.927pin,-8.9cc,446g,12.6CR, 2618.
SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 359cid 4.040 x 1.250CH, 3.500stroke,6.000rod,0.927pin,-8.9cc,423g,12.1CR, 2618.
SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 363cid 4.065 x 1.250CH, 3.500stroke,6.000rod,0.927pin,-8.9cc,432g,12.2CR, 2618.
SMALL BLOCK CHEVY 21? FLAT TOP Gasported / Asymmetrical Valve Pockets PowerPak Plus 361cid 4.050 x 1.250CH, 3.500stroke,6.000rod,0.927pin,-8.9cc,427g,12.1CR, 2618.
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